Find the center, radius, and intercepts of the circle.x2 + y2 - 2x + 2y - 10 = 0
A. (h, k) = (1, -1), r = 2
x-int: x = 1 ± 
; y-int: y = -1 ± 
B. (h, k) = (1, -1), r = 2
x-int: x = -1 ± 
; y-int: y =1 ± 
C. (h, k) = (-1, -1), r = 2
x-int: x = 1 + 
; y-int: y = -1 + 
D. (h, k) = (-1, 1), r = 12
x-int: x = 1 + 
; y-int: y = -1 + 
Answer: A
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Use point-by-point plotting to sketch the graph of the equation.y = x2 + 4
A. 
B. 
C. 
D. 
Solve.The weight of a body above the surface of the earth varies inversely as the square of its distance from the center of the earth. What is the effect on the weight when the distance is multiplied by 2?
A. The weight is multiplied by 4. B. The weight is divided by 4. C. The weight is divided by 2. D. The weight is multiplied by 2.
Solve the system of equations by the substitution method.
A. (-15, 5) B. (5, -15) C. infinite number of solutions D. no solution
Solve the formula for the specified variable.r = 
for ?
A. ? = 
2
B. ? = 
C. ? = 
D. ? = 